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Main power connection
Connection label:
Machine power connections are made at the back of the machine. Three or four conductor power cable
is the recommended method (See chapter electrical specs for minimum cable requirements, if local
electrical codes exceed these requirements, follow local codes). The number of conductors in this cable
and the proper connection points for the cable wires shall be determined by the machine and power
requirements. All machines must have a ground wire and be properly grounded. The ground wire must
be insulated with a green/yellow color. This wire is normally within the power cable but can also be a
separate wire run along side the power cable if properly sized.
Never run a machine that does not have a ground wire. This ground wire must be connected to
the machine grounding lug found near the main switch. This lug is identied with the international
“protective earth” symbol and the letters “PE”. Failure to connect this ground wire can lead to an unsafe
machine condition leading to machine damage and/or operator injury or death. This wire must be
connected to earth ground at far end.
Machine Power Cable Connections:
Remove main switch cover plate at back of machine (see chapter dimensions part (F)). Run power cable
through the cabinet knock-out located directly below the cover plate. Before installing, obtain and install
a cord-grip to hold the cable in place. Never rely upon the electrical connections to hold cable in place.
Allow some slack in this cable outside of the machine to form a drip-loop between the supply power circuit
breaker and the machine knock-out. Connect power cable wires as directed below. Always connect the
ground wire rst and remove last.
Wiring based on the supply power and machine design (voltage/frequency):
440-480 Volts, 3-Phase, 3-wire or 4-wire + PE, 50 or 60 Hertz Conguration (Named: N-Voltage):
With supply power of: 440-480 Volts, 3-phase, 3-wire, after connecting the green/yellow PE ground wire,
connect one wire to each of the bottom terminals of the power contactor switch marked: “L1,L2,L3”. When
this supply power has four wires, connect this 4th wire, identied as a neutral wire, to the bottom terminal
of the auxiliary contactor on the power contactor switch marked: “N”. Connect the remaining power wires
as rst noted.
380-415 Volts, 3-Phase, 4-wire + PE, 50 or 60 Hertz Conguration (Named: P-Voltage):
With supply power of: 380-415 Volts, 3-phase, 4-wire, after connecting the green/yellow PE ground wire,
follow the directions of the four wire system for 440-480 Volt conguration.